CN212315991U - Polymer production apparatus - Google Patents
Polymer production apparatus Download PDFInfo
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- CN212315991U CN212315991U CN202021196703.3U CN202021196703U CN212315991U CN 212315991 U CN212315991 U CN 212315991U CN 202021196703 U CN202021196703 U CN 202021196703U CN 212315991 U CN212315991 U CN 212315991U
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Abstract
The utility model discloses a polymer manufacturing installation, polymer manufacturing installation includes: a polymerization reaction system for performing a polymerization reaction on a solution as a raw material to produce a polymer; an additive injection system for injecting an additive into a polymer produced by the polymerization system; and the pelletizing system is used for slicing the polymer injected with the additives to manufacture a final finished product. According to the utility model provides a polymer manufacturing installation, final product property can be excellent, is applicable to most continuous polymerization processes, has good operability.
Description
Technical Field
The utility model relates to a spinning cake field of handling especially relates to a polymer manufacturing installation.
Background
The polymerization reaction is one of organic reactions. Polymerization is a chemical unit process that combines one or more substances with simple small molecules into a substance with a large molecular weight. Nylon (Nylon) is an artificial polymer, fiber, plastic, Nylon fiber is a raw material for various artificial fibers, and hard Nylon is also used in the construction industry. The most common nylons are nylon 6 and nylon 66.
At present, in the polymerization technology of continuous additives (continuous additives), the additives are all injected at the front end, and the injection mode has some problems. Specifically, the following disadvantages are mainly included.
First, the presence of a portion of the additive as a separate element in the final polymerization chip improves the specific properties of the polymerization chip regardless of the polymerization process. However, with the front end injection, the additive (mostly inorganic compounds) will run through the whole polymerization process, which will rather hinder the polymerization reaction.
Secondly, in the process of salt solution concentration and subsequent polymerization, part of additives (mostly inorganic compounds) have agglomeration phenomenon, and exist in the product as larger particles, which causes adverse effect on the final product performance.
Thirdly, part of the additives do not participate in the reaction, but adhere to the surface of the equipment, which seriously affects the operation period of the equipment, and simultaneously, because the content of the additives in the product is reduced, a larger injection amount is needed, which causes the loss of the additives, and for part of the more expensive additives, the product cost is increased.
Finally, when the additive is replaced and the polymerization reaction product is switched, the residual additive remained before the surface of the equipment can still continuously enter the product, so that the product is polluted and the quality of the product is influenced.
However, if the additive is added to the back end instead, the following problems occur: the viscosity at the back end is high and dispersion problems can occur after the additives are injected. The content of the additive has great influence on the product performance, and poor control of the additive addition amount can cause the reduction of the product performance.
Therefore, it is clear that the technical problem to be solved by those skilled in the art is to provide an improved polymer manufacturing apparatus, which can improve product performance, save cost and reduce pollution.
SUMMERY OF THE UTILITY MODEL
In order to solve the deficiencies of the prior art, the main object of the present invention is to provide a polymer manufacturing apparatus, which solves the problems of additive dispersion feasibility, equipment route feasibility and process route feasibility, and the final product has excellent performance, is suitable for most continuous polymerization processes, and has good operability.
In order to achieve the above object, a first embodiment of the present invention provides the following:
a polymer production apparatus comprising:
a polymerization reaction system for performing a polymerization reaction on a solution as a raw material to produce a polymer;
an additive injection system for injecting an additive into a polymer produced by the polymerization system;
and the pelletizing system is used for slicing the polymer injected with the additives to manufacture a final finished product.
According to the utility model provides a polymer manufacturing installation can promote and produce property ability, practice thrift the cost, alleviate the pollution, has considerable economic benefits.
Drawings
Fig. 1 is a schematic view of a polymer production apparatus of the present invention.
Fig. 2 is a schematic view of the additive injection system of fig. 1.
Fig. 3 is a detailed schematic view of the polymer production apparatus of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the polymer production apparatus of the first embodiment includes: a polymerization reaction system for performing a polymerization reaction on a solution as a raw material to produce a polymer; an additive injection system for injecting an additive into a polymer produced by the polymerization system; and the pelletizing system is used for slicing the polymer injected with the additives to manufacture a final finished product. Specifically, the polymerization process of the polymerization reaction system is: referring to fig. 3, a solution as a raw material, for example, nylon 66 salt solution, enters an evaporator, and is continuously boiled under a certain temperature and pressure to remove a part of water, so that the concentration of the salt solution is concentrated to 70-80%. Then the salt solution is heated by a preheater to increase the temperature of the salt solution, so as to prepare for the next reaction. The nylon 66 salt solution is further increased to 90% in concentration in the reactor at higher temperature and pressure, and the nylon 66 salt is prepolymerized to form short-chain small-molecule prepolymer. Then the diameter of the material pipe in the flash evaporator is increased for several times, so that the prepolymer is separated from the moisture, and the temperature of the prepolymer is further increased. After the materials enter the polymerizer, the moisture separated by the flash evaporator and the moisture discharged by the further polycondensation of the polymer are discharged through the polymerizer exhaust condensing system and the vacuum system, and the degree of polycondensation reaction of the polymer can be influenced by adjusting the vacuum degree of the polymerizer, so that the viscosity of the nylon 66 polymer required by production is finally achieved. And the reacted polymer enters a pelletizing system through a conveying pipeline, is cut into regular nylon 66 slices, and is finally packaged.
As shown in fig. 2, the additive injection system includes: a supply system for supplying an additive; an extrusion system for extruding the additive; a delivery system for delivering the additive. The feeding system, the extruding system and the conveying system are connected into a whole through pipelines. Wherein the feeding system comprises a feeding system, a first weightless scale 5, a second weightless scale 51, a first additive feeding screw 6 and a second additive feeding screw 61. The feeding system is respectively connected with the first weightlessness scale 5 and the second weightlessness scale 51, the first weightlessness scale 5 is connected with the first additive supply screw 6, and the second weightlessness scale 51 is connected with the second additive supply screw 61. The first additive supply screw 6 and the second additive supply screw 61 are connected to the inlets of the extrusion system 7, respectively. The weightless scale is a weighing device with discontinuous feeding and continuous discharging, and can achieve higher control precision because the loss control is carried out in a hopper, and is suitable for controlling and proportioning of fine materials.
The feeding system comprises a feeding pump 1, a dust remover 2, a first vacuum rod 3, a second vacuum rod 31, a first storage bin 4 and a second storage bin 41, the feeding pump 1 and the dust remover 2 are connected through a pipeline, and the first storage bin 4 and the second storage bin 41 are respectively connected with the dust remover 2. The dust collector 2 is preferably a bag type dust collector, but is not limited thereto, and other dust collectors may be used.
The side surface of a first storage bin 4 filled with the additive A is connected with a first vacuum rod 3, and the bottom of the first storage bin 4 is connected with a first weightless scale 5 and then connected with a first additive feeding screw 6.
The side of the second silo 41 filled with the additive B is connected with the second vacuum rod 31, and the bottom of the second silo 41 is connected with the second weightless scale 51 and then connected with the second additive feeding screw 61.
One end of the extrusion system 7 is connected to a gear box 73, a first auxiliary system 71 is connected to the extrusion system 7, and a second auxiliary system 72 controls the gear box 73.
The extrusion system 7 is provided with a heating system and has a double-screw structure with an electric heater. Wherein the heating system is divided into 7 sections, and the first auxiliary system 71 connected with the extrusion system 7 is a cooling water system, which together form a temperature control system of the extrusion system. The second auxiliary system 72 to which the gearbox 73 is connected is a gearbox oil circulation system. Both auxiliary systems are provided with respective circulation pumps.
The conveying system comprises a conveying pump 8, a conveying pipeline 9, an injection valve 10 and a pipeline 11, wherein the conveying pump 8 is connected with the end part of the other end, opposite to the gear box 73, of the extrusion system 7, one end of the injection valve 10 is connected with the conveying pump 8 through the conveying pipeline 9, and the other end of the injection valve is connected with the pipeline 11. The line 11 is for example a main material line.
A first switch valve 13 is arranged between the bottom of the first storage bin 4 and the first weightless scale 5.
A second switch valve 131 is arranged between the bottom of the second storage bin 41 and the second weightless scale 51.
The supply system further includes a first hopper 12 having an internal space, and a second hopper 121 having an internal space, the hopper 12 being connected to the first magazine 4, and the second hopper 121 being connected to the second magazine 41.
The first vacuum wand 3 is located inside the space of the first hopper 12 and the second vacuum wand 31 is located inside the space of the second hopper 121.
In a specific implementation process, an additive is added at the rear end of a continuous production line, for example, nylon 66 polymerization, and the following scheme is adopted to overcome the defects in the prior art:
1. for the dispersion problem, since the product is nylon 66 chip, the nylon 66 is set as a base material in the additive formulation, and the amount thereof is large, and one or more other special additives are selected according to the specific properties of the desired product, but the additive must be surface-treated so as to be similarly compatible with the nylon 66 in a molten state. Thus, the special additive can obtain good dispersibility after being injected into the pipeline in a molten state.
2. For the content problem of the additive, the weight loss scale is used for accurately metering, and the continuous feeding of the weight loss scale is realized through a feeding system. Heating and melting several additives by an extrusion system with a double-screw structure of an electric heater, fully mixing the additives in a molten state by screw conveying of an extruder, and finally pressurizing the additives extruded by the extrusion system by a gear box and injecting the additives into a pipeline.
In conclusion, according to the additive formula of the product, the adding speed of the additive is obtained by combining the production speed of the main material, and the weightless scale, the extrusion system and the gear box are reasonably selected. And determining the temperature parameters of each heating section of the extrusion system according to the physical parameters of the additive. The rotating speed of the gear box and the extrusion system is set through the inlet and outlet pressure of the gear box.
The parameters of the feeding system in the specific implementation process are as follows.
The specific parameters for the extrusion system implementation are given in the table below.
The specific parameters of the delivery system during implementation are as follows.
The specific parameters of the circuit are as follows.
As described above, according to the polymer production apparatus of the first embodiment, compared to the prior art, the addition from the front end is performed throughout the entire polymerization process, and a simple physical dispersion problem at the rear end is achieved, thereby eliminating the possibility of adverse effects on the polymerization reaction; the additive is subjected to surface treatment, so that the additive is well compatible with the main material, and the product performance is further improved due to good dispersion performance; the front-end equipment only carries out single polymerization reaction, so that the equipment runs stably, the running period of the equipment is prolonged, the overhaul period is prolonged, and the economic benefit is improved; the additive is added at the rear end and completely enters the product, so that the possibility of additive loss does not exist, and the product cost is correspondingly reduced; the rear end of the additive is added, so that the possibility of pollution of front-end polymerization equipment is eliminated, the product is converted into a product only by replacing the additive, a pipeline at the rear end is easy to clean in the high-speed flow of materials, only a few transition materials are generated, and continuous pollution of a subsequent new product is avoided; not limited to nylon 66, and is almost suitable for most continuous polymerization processes.
It should be noted that, each unit mentioned in each device implementation of the present invention is a logic unit, and physically, a logic unit may be a physical unit, or may be a part of a physical unit, and may also be implemented by a combination of a plurality of physical units, and the physical implementation manner of these logic units itself is not the most important, and the combination of the functions implemented by these logic units is the key to solve the technical problem proposed by the present invention. Furthermore, in order to highlight the innovative part of the present invention, the above-mentioned embodiments of the device of the present invention do not introduce the elements that are not closely related to the solution of the technical problem proposed by the present invention, which does not indicate that the above-mentioned embodiments of the device do not have other elements.
It is to be noted that in the claims and the description of the present patent, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A polymer production apparatus, comprising:
a polymerization reaction system for performing a polymerization reaction on a solution as a raw material to produce a polymer;
an additive injection system for injecting an additive into a polymer produced by the polymerization system;
and the pelletizing system is used for slicing the polymer injected with the additives to manufacture a final finished product.
2. The polymer production apparatus according to claim 1,
the additive injection system comprises:
a supply system for supplying an additive;
an extrusion system for extruding the additive;
a delivery system for delivering the additive.
3. The polymer production apparatus according to claim 1,
the polymerization reaction system comprises:
an evaporator for evaporating a portion of the water from the solution;
the preheater is used for heating the solution treated by the evaporator;
a reactor for reacting the solution heated by the preheater to form a prepolymer;
a flash evaporator for separating the prepolymer from the water in the solution treated by the reactor;
and the polymerizer is used for reacting the solution treated by the flash evaporator to form a polymer.
4. The polymer production apparatus according to claim 2,
the supply system includes:
a feeding system;
a weightlessness scale connected with the feeding system;
an additive supply screw connected with the weightless scale;
a hopper having an interior space.
5. The polymer production apparatus according to claim 4,
the feeding system includes:
a feeding pump;
the dust remover is connected with the feeding pump through a pipeline;
the bin is connected with the dust remover;
and the vacuum rod is connected with the storage bin.
6. The polymer production apparatus according to claim 2,
also comprises a gear box, a first auxiliary system and a second auxiliary system,
the extrusion system is controlled by a first auxiliary system,
the gearbox is connected with the extrusion system and is controlled by a second auxiliary system.
7. The polymer production apparatus according to claim 5,
the conveying system comprises:
a delivery pump connected to the extrusion system;
a delivery conduit;
the injection valve is connected with the delivery pump through a delivery pipeline;
a pipeline connected with the injection valve.
8. The polymer production apparatus according to claim 7,
a switch valve is arranged between the bottom of the storage bin and the weightless scale.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021196703.3U CN212315991U (en) | 2020-06-24 | 2020-06-24 | Polymer production apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021196703.3U CN212315991U (en) | 2020-06-24 | 2020-06-24 | Polymer production apparatus |
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| CN212315991U true CN212315991U (en) | 2021-01-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111607079A (en) * | 2020-06-24 | 2020-09-01 | 席瑞阳 | Polymer production device and polymer production method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111607079A (en) * | 2020-06-24 | 2020-09-01 | 席瑞阳 | Polymer production device and polymer production method |
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