CN215866253U

CN215866253U - Viscosity on-line monitoring device for recycled polyester granulation

Info

Publication number: CN215866253U
Application number: CN202122215402.1U
Authority: CN
Inventors: 韩扬; 黄天峰; 赵翔
Original assignee: Yangzhou Whitehead Technology Co ltd
Current assignee: Yangzhou Whitehead Technology Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-02-18
Anticipated expiration: 2031-09-14

Abstract

The utility model discloses a viscosity on-line monitoring device for recycled polyester granulation, which belongs to recycled polyester granulation and is used for viscosity monitoring, and the device comprises a plurality of sampling inlet pipes, wherein two ends of each sampling inlet pipe are respectively communicated with a sampling pipe and a primary feeding section of a melt extrusion device; the primary feeding section is communicated with the monitoring section, the other end of the monitoring section is communicated with the final feeding section, a sampling outlet pipe is communicated below the outlet end of the final feeding section, and the sampling outlet pipe is communicated with the recovery device; the outer surfaces of the sampling inlet pipe, the primary feeding section, the monitoring section and the final feeding section are covered with heating sleeves; the position department of monitoring section installs earlier year sensor, the position department intercommunication of sample import pipe has the steam to clean the house steward, and the steam cleans the house steward and passes through stop valve and steam supply pipeline intercommunication. In view of the above technical scheme, it can realize the promotion of monitoring devices flexibility and after-sales maintainability through redesign to monitoring devices's structure.

Description

Viscosity on-line monitoring device for recycled polyester granulation

Technical Field

The utility model belongs to the field of recycled polyester granulation, and particularly relates to an on-line viscosity monitoring device for recycled polyester granulation.

Background

The granulation of the regenerated polyester generally comprises the steps of melt extrusion, mixing and tackifying, impurity separation, melt molding, grain cutting recovery and the like, and the liquid tackified after melting is generally required to be sampled in the process of mixing and tackifying so as to detect whether the viscosity of the liquid tackified after melting meets the requirements of the subsequent process, thereby avoiding the product quality problem caused by the unqualified viscosity. The existing monitoring equipment is mostly integrated with a reaction kettle or the equipment structure is too complex, and the after-sale maintenance is difficult except for the flexibility problem, so how to carry out more flexible and convenient viscosity monitoring on the melted regenerated polyester melt becomes a technical problem to be solved in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an on-line viscosity monitoring device for recycled polyester granulation, which can improve the flexibility and after-sale maintainability of the monitoring device by redesigning the structure of the monitoring device.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the viscosity on-line monitoring device for the granulation of the regenerated polyester comprises a plurality of sampling inlet pipes, wherein two ends of each sampling inlet pipe are respectively communicated with a sampling pipe and a primary feeding section of a melting extrusion device; the primary feeding section is communicated with the monitoring section, the other end of the monitoring section is communicated with the final feeding section, a sampling outlet pipe is communicated below the outlet end of the final feeding section, and the sampling outlet pipe is communicated with the recovery device; the outer surfaces of the sampling inlet pipe, the primary feeding section, the monitoring section and the final feeding section are covered with heating sleeves; the on-line viscosity sensor is installed at the position of the monitoring section, the position of the sampling inlet pipe is communicated with a steam cleaning main pipe, and the steam cleaning main pipe is communicated with a steam supply pipeline through a stop valve.

Furthermore, an end cover is installed at the inlet end of the primary feeding section, a driving device is fixed on the end cover, the output end of the driving device is connected with a stirring shaft, and the stirring shaft penetrates through the end cover and then extends into the primary feeding section; the stirring shaft and the primary feeding section are coaxially arranged, and helical blades integrated with the stirring shaft are arranged at the position of the stirring shaft in the primary feeding section.

Furthermore, an end cover is installed at the outlet end of the final feeding section, a driving device is fixed on the end cover, the output end of the driving device is connected with a stirring shaft, and the stirring shaft penetrates through the end cover and then extends into the primary feeding section; the stirring shaft and the primary feeding section are coaxially arranged, and helical blades integrated with the stirring shaft are arranged at the position of the stirring shaft in the primary feeding section.

Furthermore, the monitoring section comprises a pipe body structure, two ends of the pipe body structure are connected with the primary feeding section and the final feeding section, a monitoring port is arranged at the top of the pipe body structure, the end part of the monitoring port is connected with a monitoring port cover body through a bolt and a sealing piece, and an online viscosity sensor is arranged at the central axis position of the monitoring port cover body.

Furthermore, the steam cleaning main pipe is communicated with the steam cleaning branch pipe, the steam cleaning branch pipe is communicated with the steam inlet pipe on the monitoring opening cover body, the steam inlet pipe is provided with a stop valve, and the steam inlet pipe penetrates through the monitoring opening cover body and then extends into the upper part of the inner wall of the monitoring section.

Furthermore, an included angle alpha exists between the central axis of the sampling inlet pipe and the central axis of the primary feeding section at one side of the inlet end of the primary feeding section, and the included angle alpha is an acute angle.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the feeding section and the monitoring section are arranged, and the sampling inlet pipe is connected with the sampling pipe positioned on the reaction kettle, so that sampling detection under the normal production working state of the reaction kettle is not influenced, and the sampling inlet pipe is connected with the sampling pipe at different positions of the reaction kettle, so that the viscosity between different levels of the reaction kettle can be monitored on line, and the flexibility of the device is improved. Meanwhile, the utility model has simpler structure and more convenient after-sale maintenance.

Drawings

Fig. 1 is a schematic view of the external structure of the present invention (only one sampling inlet pipe is shown).

Fig. 2 is a schematic view of the internal structure of the present invention (only two sampling inlet pipes are shown).

In the figure: 1. a sampling tube; 2. a sampling inlet pipe; 3. cleaning a main pipe by steam; 4. cleaning branch pipes by steam; 5. a primary feeding section; 6. a monitoring section; 7. an online viscosity sensor; 8. a steam inlet pipe; 9. a monitoring port cover body; 10. a monitoring port; 11. a final feeding section; 12. an end cap; 13. a drive device; 14. a sampling outlet pipe; 15. a stirring shaft; 16. a helical blade; 17. and (4) heating the sleeve.

Due to the space limitation of the attached drawings, the proportion relation of partial structures in the attached drawings is adjusted adaptively, but the adjustment is mainly used for showing the internal structure clearly so as to facilitate the technical scheme of the utility model to be better understood by those skilled in the art.

Detailed Description

The technical solution of the present invention will be further described and illustrated with reference to the following examples. It should be noted that the following paragraphs may refer to terms of orientation, including but not limited to "upper, lower, left, right, front, rear" and the like, which are all based on the visual orientation shown in the drawings corresponding to the specification, and should not be construed as limiting the scope or technical aspects of the present invention, but merely as facilitating better understanding of the technical aspects of the present invention by those skilled in the art.

In the description of the present specification, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; 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 by those skilled in the art according to specific situations.

Example 1

The utility model provides a viscosity on-line monitoring device for reclaimed polyester granulation, is including connecting in the sampling inlet pipe 2 of different positions department sampling tube 1 on reation kettle, and sampling inlet pipe 2 can set up a plurality of different branches and communicate with the sampling tube 1 of different positions department through the stop valve. The sampling inlet pipe 2 is also communicated with a steam cleaning header pipe 3, and the steam cleaning header pipe 3 is communicated with an external steam supply pipeline. The sampling inlet pipe 2 is communicated with the primary feeding section 5, an acute included angle exists between the central axis of the primary feeding section 5 and the central axis of the sampling inlet pipe 2, and the inlet end of the sampling inlet pipe 2 and the inlet end of the primary feeding section 5 are positioned on the same side, so that the polyester melt can more stably flow into the primary feeding section 5. An end cover 12 is connected to the inlet end of the primary feeding section 5, a driving device 13 is arranged at the central axis of the end cover 12, and the driving device 13 selects a driving motor with a speed reducing mechanism. The driving device 13 is connected with a stirring shaft 15, and the stirring shaft 15 is coaxially arranged with the primary feeding section 5 and extends towards the outlet end of the primary feeding section 5. A helical blade 16 is arranged at the position of the stirring shaft 15 in the primary feeding section 5, the helical blade 16 rotates along with the stirring shaft 15 and pushes the material fed by the sampling inlet pipe 2 to the monitoring section 6 in the rotating process. The monitoring section 6 is of a tubular structure, one end of the monitoring section is communicated with the outlet end of the primary feeding section 5, and the other end of the monitoring section is communicated with the inlet end of the final feeding section 11. The monitoring section 6 is provided with a monitoring port 10 communicated with the inside of the monitoring section, the top end of the monitoring port 10 is connected with a monitoring port cover body 9 through a bolt and a sealing piece, and the central axis of the monitoring port cover body 9 is provided with an online viscosity sensor 7 extending towards the inside of the monitoring section 6. Still be provided with steam on the monitoring mouth lid 9 and advance a pipe 8, steam advances the top of pipe 8 and cleans branch pipe 4 intercommunication through stop valve and steam, and steam cleans branch pipe 4 and steam and cleans house steward 3 intercommunication, and the bottom that steam advances pipe 8 stretches into to 6 body inner walls tops of monitoring section behind passing monitoring mouth lid 9. A stirring shaft 15 with a helical blade 16 is arranged at the central axis of the interior of the last feeding section 11, and the stirring shaft 15 passes through the end cover 12 at the outlet end of the last feeding section 11 and then is communicated with the driving device 13. The exterior of the sampling inlet pipe 2, the primary feeding section 5, the monitoring section 6, the final feeding section 11 and the sampling outlet pipe 14 are covered with a heating jacket 17.

On the basis of the above embodiments, the present invention continues to describe the technical features and functions of the technical features in the present invention in detail to help those skilled in the art fully understand the technical solutions of the present invention and reproduce them.

As shown in FIGS. 1 to 2, a plurality of sampling inlet pipes 2 can be provided in the present invention, which are designed to communicate with sampling pipes 1 at different positions of the reaction vessel, so as to monitor the viscosity of the molten polyester at different levels of the reaction vessel. Simultaneously, for the convenience of taking a sample import pipe 2, elementary material conveying section 5, monitoring section 6 and final stage material conveying section 11, the clearance of sample outlet pipe 14 after the monitoring is accomplished, avoid the polyester melt because the jam that the internal temperature reduces and cause, all be provided with the steam that the steam cleaned the function and clean house steward 3, steam clean branch pipe 4 in sample import pipe 2 and monitoring section 6 department.

Meanwhile, in the utility model, in order to avoid the problem of fluidity caused by the temperature difference between the sampling device and the reaction kettle, heating sleeves 17 are arranged at the sampling inlet pipe 2, the primary feeding section 5, the monitoring section 6 and the final feeding section 11, and the heating sleeves 17 can be electrically heated so as to facilitate better temperature control. Meanwhile, a heating jacket 17 having an electric heating function may be provided at the sampling outlet pipe 14.

In the utility model, the monitoring section 6 adopts an online viscosity sensor, and a person skilled in the art can realize viscosity monitoring of the fluid medium in the monitoring section 6 by selecting different types of online viscosity sensors sold on the market, such as HYND-80W type high-temperature online viscometer, which can have a temperature detection range of-50 ℃ to 500 ℃, and can have the characteristics of high precision, good repeatability and strong stability.

In the present invention, the primary feeding section 5 and the final feeding section 11 are only used for feeding and discharging the sampled polyester melt, so as to ensure that the melt in the monitoring section 6 has the fluidity required for measuring the viscosity. Meanwhile, in the cleaning process, the primary feeding section 5 and the final feeding section 11 can promote the contact of cleaning steam and the inside, and the cleaning effect is improved.

When the device is used, the polyester melt in the reaction kettle is pressed into the sampling inlet pipe 2 by the pressure generated by stirring of the reaction kettle by opening the stop valves of the sampling pipes 1 at different positions. The shut-off valve on the steam purge header 3 is now closed. The polyester melt enters the primary feeding section 5, is rapidly stacked and gradually gathers towards the monitoring section 6 under the action of the driving device 13, the stirring shaft 15 and the helical blades 16. When the collected polyester melt meets the detection requirement of the on-line viscosity sensor 7, the polyester melt continues to move to the final feeding section 11, and the stirring shaft 15 and the helical blades 16 in the final feeding section 11 can be driven by the driving device 13 arranged on the stirring shaft and the helical blades, so that the polyester melt is collected to the sampling outlet pipe 14 and is discharged through the sampling outlet pipe 14.

After the monitoring is finished, the stop valve at the sampling pipe 1 is closed, the driving devices 13 on the primary feeding section 5 and the final feeding section 11 continue to drive the stirring shaft 15 and the helical blades 16 to rotate, so that the internal polyester melt is continuously discharged, when no polyester melt or a small amount of polyester melt is discharged from the sampling outlet pipe 14, the recovery device at the sampling outlet pipe 14 is removed, and the stop valve on the steam cleaning header pipe 3 is started. Steam on the external steam supply pipeline enters the sampling inlet pipe 2, the primary feeding section 5 and the final feeding section 11 through the steam cleaning main pipe 3 and the steam cleaning branch pipe 4, and is subjected to the combined action of the stirring shaft 15 and the helical blades 16, so that melt in the whole device is discharged as soon as possible, and the influence on the on-line monitoring of the position of the next batch is avoided.

It should be noted that, because the present invention provides a plurality of sampling inlet pipes 2 and performs sampling, it is not real-time monitoring, but on-line sampling monitoring is performed by those skilled in the art within a specified time interval. At the moment, the stop valves of the sampling pipes 1 of the reaction kettle corresponding to the different sampling inlet pipes 2 can be selected to be opened or closed, so that the viscosity of the reaction kettle at different positions or a single position can be monitored.

Finally, although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description of the present description is for clarity reasons only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An on-line viscosity monitoring device for recycled polyester granulation comprises a sampling inlet pipe (2), and is characterized in that: the sampling inlet pipes (2) are multiple, and two ends of each sampling inlet pipe (2) are respectively communicated with the sampling pipe (1) and the primary feeding section (5) of the melting extrusion device; the primary feeding section (5) is communicated with the monitoring section (6), the other end of the monitoring section (6) is communicated with the final feeding section (11), a sampling outlet pipe (14) is communicated below the outlet end of the final feeding section (11), and the sampling outlet pipe (14) is communicated with a recovery device; the outer surfaces of the sampling inlet pipe (2), the primary feeding section (5), the monitoring section (6) and the final feeding section (11) are covered with heating sleeves (17); the on-line viscosity sensor is installed at the position of the monitoring section (6), the position of the sampling inlet pipe (2) is communicated with the steam cleaning main pipe (3), and the steam cleaning main pipe (3) is communicated with the steam supply pipeline through a stop valve.

2. The on-line viscosity monitoring device for recycled polyester granulation as claimed in claim 1, wherein: an end cover (12) is installed at the inlet end of the primary feeding section (5), a driving device (13) is fixed on the end cover (12), the output end of the driving device (13) is connected with a stirring shaft (15), and the stirring shaft (15) penetrates through the end cover (12) and then extends into the primary feeding section (5); the stirring shaft (15) and the primary feeding section (5) are coaxially arranged, and helical blades (16) integrated with the stirring shaft (15) are arranged at the position, located inside the primary feeding section (5), of the stirring shaft (15).

3. The on-line viscosity monitoring device for recycled polyester granulation as claimed in claim 2, wherein: an end cover (12) is installed at the outlet end of the final feeding section (11), a driving device (13) is fixed on the end cover (12), the output end of the driving device (13) is connected with a stirring shaft (15), and the stirring shaft (15) penetrates through the end cover (12) and then extends into the primary feeding section (5); the stirring shaft (15) and the primary feeding section (5) are coaxially arranged, and helical blades (16) integrated with the stirring shaft (15) are arranged at the position, located inside the primary feeding section (5), of the stirring shaft (15).

4. The on-line viscosity monitoring device for recycled polyester granulation as claimed in claim 3, wherein: the monitoring section (6) comprises a pipe body structure, wherein the two ends of the pipe body structure are connected with the primary feeding section (5) and the final feeding section (11), a monitoring port (10) is arranged at the top of the pipe body structure, the end part of the monitoring port (10) is connected with a monitoring port cover body (9) through a bolt and a sealing piece, and an online viscosity sensor (7) is installed at the position of the central axis of the monitoring port cover body (9).

5. The on-line viscosity monitoring device for recycled polyester granulation according to claim 4, characterized in that: the steam cleaning main pipe (3) is communicated with a steam cleaning branch pipe (4), the steam cleaning branch pipe (4) is communicated with a steam inlet pipe (8) on a monitoring port cover body (9), a stop valve is arranged on the steam inlet pipe (8), and the steam inlet pipe (8) penetrates through the monitoring port cover body (9) and then extends into the upper portion of the inner wall of the monitoring section (6).

6. The on-line viscosity monitoring device for recycled polyester granulation according to any one of claims 1 to 5, characterized in that: an included angle alpha exists between the central axis of the sampling inlet pipe (2) and the central axis of the primary feeding section (5) on one side of the inlet end of the primary feeding section (5), and the alpha is an acute angle.