Polyester esterification kettle delustering agent adding device

Abstract

The utility model relates to the technical field of polyester production, in particular to a delustering agent adding device of a polyester esterification kettle, which comprises a delustering agent finished product tank, a delustering agent delivery pump, an esterification kettle, a gas phase pipeline, a process tower and a recycled EG delivery pump, the delustering agent delivery pump is connected with the delustering agent finished product tank through a pipeline, and the esterification kettle is connected with the delustering agent delivery pump through a pipeline. The gas phase pipeline is connected with the esterification kettle through a pipeline, the process tower is connected with the gas phase pipeline, and the recycled EG conveying pump is connected with the process tower and used for conveying high-temperature recycled EG to the delustering agent conveying pipeline. According to the device, a normal-temperature delustering agent suspension and high-temperature recycled EG are fully diluted and mixed and then are injected into the esterification kettle, so that the delustering agent can be uniformly dispersed in a polyester system, and the consistency of the delustering effect of a product is improved; meanwhile, in the adding process, high-temperature recycled EG is injected into the process tower, so that jumping stop of a delustering agent conveying pump caused by blockage of a delustering agent injection port is avoided, and material temperature fluctuation of the esterification kettle is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the polyester production technical field relates to a polyester esterification kettle extinction agent adding device. BACKGROUND

[0002] In the polyester production process, in order to obtain the polyester product with specific optical performance, it is often necessary to add extinction agent, and the traditional extinction agent adding method has some problems, for example, the extinction agent is not uniformly dispersed in the polyester system, resulting in inconsistent extinction effect of the product, affecting the product quality, in addition, the existing adding method can increase the energy consumption and pipeline blockage in the production process, which is not conducive to the production stability and the reduction of production cost. Therefore, a new polyester esterification kettle extinction agent adding method is needed to solve the above problems. SUMMARY

[0003] The utility model provides a polyester esterification kettle extinction agent adding device to solve the prior art problems.

[0004] The utility model discloses a polyester esterification kettle extinction agent adding device, which can solve the problems of uneven dispersion of extinction agent in the polyester system, inconsistent extinction effect of the product, and increase of energy consumption and pipeline blockage in the production process.

[0005] The extinction agent finished product tank is used for storing the extinction agent suspension, and includes a tank body, a stirring device, a first feed inlet and a first discharge outlet.

[0006] The extinction agent delivery pump is connected with the extinction agent finished product tank pipeline, and is used for delivering the extinction agent suspension to the esterification kettle.

[0007] The esterification kettle is connected with the extinction agent delivery pump pipeline, and is used for carrying out polyester esterification reaction.

[0008] The gas phase pipeline is connected with the esterification kettle pipeline, and is used for delivering the esterification kettle gas phase product to the process column.

[0009] The process column is connected with the gas phase pipeline, and is used for rectifying the esterification kettle gas phase product to output high-temperature recycled EG.

[0010] The recycled EG delivery pump is connected with the process column, and is used for delivering the high-temperature recycled EG to the extinction agent delivery pipeline.

[0011] The recycled EG delivery pipeline is connected with the extinction agent delivery pipeline, so that the high-temperature recycled EG and the normal-temperature extinction agent suspension are fully diluted and mixed before entering the esterification kettle.

[0012] In a further improvement, the stirring device includes a stirring motor disposed at the upper end of the tank, a stirring shaft rotatably disposed within the tank, and stirring blades fixedly disposed within the stirring shaft.

[0013] In a further improvement, the stirring blades are provided in two sets: the upper stirring blades are anchor-type blades, and the lower stirring blades are turbine-type blades.

[0014] In a further improvement, the esterification reactor includes a reactor body, a stirrer, a second inlet, and a second outlet, wherein the second inlet is connected to the recycled EG conveying pipeline and the matting agent conveying pipeline.

[0015] In a further improvement, a matting agent mass flow meter is installed between the matting agent delivery pump and the esterification reactor to measure the flow rate of the matting agent suspension.

[0016] A further improvement is the addition of a reclaimed EG mass flow meter between the reclaimed EG transfer pump and the esterification reactor, used to measure the flow rate of high-temperature reclaimed EG.

[0017] As a further improvement, an insulation layer is provided on the outside of the gas phase pipeline.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention, by fully diluting and mixing the room temperature matting agent suspension with high temperature recycled EG before injecting it into the esterification reactor, can make the matting agent uniformly dispersed in the polyester system, avoid the occurrence of agglomeration, thereby improving the consistency of the matting effect of the product. At the same time, during the addition process, the injection of high temperature recycled EG from the process tower avoids the matting agent injection port blockage that could cause the matting agent delivery pump to trip, and also reduces the consumption cost of EG and the energy consumption of the esterification reactor, effectively reducing the material temperature fluctuation in the esterification reactor. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] In the diagram, 1. Matting agent finished product tank: 11. Tank body; 12. Stirring device: 121. Stirring motor; 122. Stirring shaft; 123. Stirring blade; 13. First feed inlet; 14. First discharge outlet; 2. Matting agent delivery pump; 3. Matting agent mass flow meter; 4. Esterification reactor: 41. Reactor body; 42. Stirrer; 43. Second feed inlet; 44. Second discharge outlet; 5. Gas phase pipeline; 6. Process tower; 7. Recycled EG delivery pump; 8. Recycled EG mass flow meter. Detailed Implementation

[0021] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The following is a description of the embodiments and appendices. Figure 1 The technical solution of this utility model will be further described below.

[0024] Example 1

[0025] A device for adding matting agent to a polyester esterification reactor includes:

[0026] The matting agent finished product tank 1 is used to store the matting agent suspension, including a tank body 11, a stirring device 12, a first inlet 13 and a first outlet 14. The stirring device 12 is used to stir the matting agent suspension, the first inlet 13 is used to add the matting agent stock solution and diluent, and the first outlet 14 is connected to the matting agent delivery pump 2.

[0027] Matting agent delivery pump 2, which is connected to the matting agent finished product tank 1 via a pipeline, is used to deliver the matting agent suspension to the esterification reactor 4;

[0028] Esterification reactor 4, which is connected to the matting agent delivery pump 2 via a pipeline, is used to carry out polyester esterification reaction;

[0029] Gas phase pipeline 5, which is connected to the pipeline of the esterification reactor 4, is used to transport the gas phase product of the esterification reactor to the process tower 6.

[0030] Process tower 6, which is connected to the gas phase pipeline 5, is used to distill the gas phase product from the esterification reactor to produce high-temperature recycled EG.

[0031] The recycled EG transfer pump 7 is connected to the process tower 6 and is used to transport high-temperature recycled EG to the matting agent delivery pipeline.

[0032] The recycled EG delivery pipeline is connected to the matting agent delivery pipeline, so that the high-temperature recycled EG and the room-temperature matting agent suspension are fully diluted and mixed before entering the esterification reactor 4.

[0033] like Figure 1 As shown, in the process of using this utility model, firstly, matting agent stock solution and diluent are added to the matting agent finished product tank 1 through the first feed port 13. The stirring device 12 is started to stir the matting agent suspension to make it uniformly mixed. Subsequently, the matting agent delivery pump 2 transports the matting agent suspension from the matting agent finished product tank 1 to the esterification kettle 4. At the same time, the process tower 6 distills the gaseous products generated in the esterification kettle 4 to separate high-temperature recycled EG. The recycled EG delivery pump 7 transports the high-temperature recycled EG to the matting agent delivery pipeline, where it is fully diluted and mixed with the room temperature matting agent suspension before entering the esterification kettle 4 to participate in the polyester esterification reaction.

[0034] This invention, by fully diluting and mixing a room-temperature matting agent suspension with high-temperature recycled EG before injecting it into the esterification reactor 4, enables the matting agent to be uniformly dispersed in the polyester system, avoiding agglomeration and thus improving the consistency of the product's matting effect. Simultaneously, the injection of high-temperature recycled EG from the process tower during the addition process prevents blockage of the matting agent injection port, thus avoiding the shutdown of the matting agent delivery pump. It also reduces the cost of EG consumption and the energy consumption of the esterification reactor, effectively minimizing material temperature fluctuations in the esterification reactor.

[0035] As a further preferred embodiment, the stirring device 12 includes a stirring motor 121 disposed at the upper end of the tank 11, a stirring shaft 122 rotatably disposed in the tank 11, and stirring blades 123 fixedly disposed in the stirring shaft 122. The stirring blades 123 are provided in two sets, with the upper stirring blades 123 being anchor blades and the lower stirring blades 123 being turbine blades.

[0036] Specifically, multi-layer stirring promotes the uniform dispersion of matting agent particles in the suspension, thereby achieving a more efficient stirring effect.

[0037] As a further preferred embodiment, the esterification reactor 4 includes a reactor body 41, a stirrer 42, a second feed inlet 43, and a second discharge outlet 44, wherein the second feed inlet 43 is connected to the recycled EG conveying pipeline and the matting agent conveying pipeline.

[0038] As a further preferred embodiment, a matting agent mass flow meter 3 is provided between the matting agent delivery pump 2 and the esterification kettle 4 to measure the flow rate of the matting agent suspension.

[0039] As a further preferred embodiment, a recycle EG mass flow meter 8 is used between the recycled EG transfer pump 7 and the esterification reactor 4 to measure the flow rate of high-temperature recycled EG.

[0040] As a further preferred embodiment, the outer side of the gas phase pipeline 5 is provided with a heat insulation layer, which not only improves the thermal efficiency of the gas phase pipeline 5 and reduces energy consumption, but also effectively avoids the risk of material condensation and pipeline blockage caused by temperature drop, ensuring the stability and continuity of the production process.

[0041] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A device for adding matting agent to a polyester esterification reactor, characterized in that, include: A matting agent finished product tank, the matting agent finished product tank being used to store matting agent suspension, including a tank body, a stirring device, a first inlet and a first outlet, the stirring device being used to stir the matting agent suspension, the first inlet being used to add matting agent stock solution and diluent, and the first outlet being connected to a matting agent delivery pump; A matting agent delivery pump, which is connected to the matting agent finished product tank pipeline, is used to deliver the matting agent suspension to the esterification reactor; An esterification reactor, which is connected to the matting agent delivery pump pipeline, is used to carry out the polyester esterification reaction; A gas phase pipeline, which is connected to the esterification reactor pipeline, is used to transport the gas phase product from the esterification reactor to the process tower; A process tower, connected to the gas phase pipeline, is used to distill the gas phase product from the esterification reactor to produce high-temperature recycled EG. A recycled EG transfer pump is connected to the process tower and is used to transport high-temperature recycled EG to the matting agent delivery pipeline. The recycled EG delivery pipeline is connected to the matting agent delivery pipeline, so that the high-temperature recycled EG and the room-temperature matting agent suspension are fully diluted and mixed before entering the esterification reactor.

2. The device for adding matting agent in a polyester esterification reactor according to claim 1, characterized in that, The stirring device includes a stirring motor mounted on the upper end of the tank, a stirring shaft rotatably mounted inside the tank, and stirring blades fixedly mounted inside the stirring shaft.

3. The device for adding matting agent to a polyester esterification reactor according to claim 2, characterized in that, The stirring blades are provided in two sets: the stirring blades in the upper layer are anchor blades, and the stirring blades in the lower layer are turbine blades.

4. The device for adding matting agent in a polyester esterification reactor according to claim 1, characterized in that, The esterification reactor includes a reactor body, a stirrer, a second inlet, and a second outlet. The second inlet is connected to the recycled EG delivery pipeline and the matting agent delivery pipeline.

5. The device for adding matting agent to a polyester esterification reactor according to claim 1, characterized in that, A matting agent mass flow meter is installed between the matting agent delivery pump and the esterification reactor to measure the flow rate of the matting agent suspension.

6. The device for adding matting agent in a polyester esterification reactor according to claim 1, characterized in that, The recycled EG mass flow meter between the recycled EG transfer pump and the esterification reactor is used to measure the flow rate of high-temperature recycled EG.

7. The device for adding matting agent in a polyester esterification reactor according to claim 1, characterized in that, An insulation layer is installed on the outside of the gas phase pipeline.

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