阅读说明：本技术 聚合物制造装置以及聚合物制造方法 (Polymer production device and polymer production method ) 是由 席瑞阳 杨雪雯 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种聚合物制造装置以及聚合物制造方法,聚合物制造装置包括：聚合反应系统,用于对作为原材料的溶液进行聚合反应而产生聚合物；添加剂注入系统,用于对聚合反应系统所产生的聚合物注入添加剂；切粒系统,用于对已注入添加剂的聚合物进行切片而制造最终成品。根据本发明提供的聚合物制造装置,最终产品性能优良,适用于大多数连续聚合工序,具有良好的操作性。(The invention discloses a polymer manufacturing apparatus and a polymer manufacturing method, the polymer manufacturing apparatus 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. The polymer production apparatus provided by the present invention is excellent in the performance of the final product, is suitable for most of the continuous polymerization processes, and has good operability.)

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.

9. A polymer production method for producing a polymer by using the polymer production apparatus according to claim 8, characterized by comprising:

heating an extrusion system, a delivery pump, a delivery pipeline and an injection valve to a set temperature;

the injection valve is arranged at a discharge position, and the additive is directly discharged through the injection valve, so that the injection valve is not communicated with the pipeline;

starting the delivery pump;

starting the extrusion system;

the feed system is started.

10. The method for producing a polymer according to claim 9,

the step of activating the feed system comprises the sub-steps of:

pouring the additive into a hopper, closing a switch valve, and simultaneously starting a feeding pump to keep a vacuum environment in a feeding system;

dipping a vacuum rod into the additive in the hopper, sucking the additive into the bin, and automatically stopping the feeding system when the set material level of the bin is reached;

starting the weightlessness scale, simultaneously automatically opening a switch valve corresponding to the weightlessness scale, and automatically closing the switch valve when the additive enters the weightlessness scale and reaches the set material level of the weightlessness scale;

starting the additive feeding screw, discharging the additive into the running extrusion system through the conveying system,

and adjusting the injection valve to the position where the additive passes through the valve so as to communicate the additive with the pipeline.

Technical Field

The invention relates to the field of spinning cake treatment, in particular to a polymer manufacturing device and a polymer manufacturing method.

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 problems to be solved by those skilled in the art are urgent to provide an improved polymer manufacturing apparatus and a polymer manufacturing method, which can improve the product performance, save the cost and reduce the pollution.

Disclosure of Invention

In order to solve the defects of the prior art, the main object of the present invention is to provide a polymer production apparatus and a polymer production method, which solve the problems of additive dispersion feasibility, equipment route feasibility and process route feasibility, have excellent final product performance, are suitable for most continuous polymerization processes, and have good operability.

In order to achieve the above object, a first embodiment of the present invention is as follows:

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.

The second embodiment of the present invention has the following technical means:

a polymer production method for producing a polymer using the polymer production apparatus of the first embodiment, comprising the steps of:

heating an extrusion system, a delivery pump, a delivery pipeline and an injection valve to a set temperature;

the injection valve is arranged at a discharge position, and the additive is directly discharged through the injection valve, so that the injection valve is not communicated with the pipeline;

starting the delivery pump;

starting the extrusion system;

the feed system is started.

According to the polymer manufacturing device and the polymer manufacturing method provided by the invention, the product performance can be improved, the cost is saved, the pollution is reduced, and the economic benefit is quite large.

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 schematic view showing the details 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 technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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.